Abstract:
A method for reducing condensation includes moving a linear motor slider that is positioned within a housing of an actuator. A first gas is pushed out of a transfer plate chamber through a first vent. A second gas is drawn into the transfer plate chamber through a second vent. Moisture is removed from the second gas as the second gas is being drawn into the transfer chamber by passing the second gas through at least one of a hydrophobic or oleophobic material.
Abstract:
A compound harmonic drive assembly includes a ring gear assembly, a wave generator, a flex spline, and a rolling element. The wave generator is received within the ring gear assembly along the rotational axis. The wave generator has a body that extends radially between an exterior surface and an interior surface. The body defines at least one groove that extends radially from the exterior surface towards the interior surface. The flex spline is disposed between the ring gear assembly and the wave generator. The rolling element is disposed between the wave generator and the flex spline.
Abstract:
A multi-slice electromechanical hinge-line rotary actuator includes a motor stator configured to generate rotational motion about a rotational axis. The multi-slice electromechanical hinge-line rotary actuator further includes a plurality of layers rotatably coupled to the motor stator. Each layer includes an output arm slice configured to rotate about the rotational axis in response to the rotational motion.
Abstract:
An inverted harmonic gear actuator is provided and includes a motor stator and a motor rotor radially disposed within the motor stator. The inverted harmonic gear actuator also includes a wave generator radially disposed within the motor rotor, where the wave generator has a radially inner surface with a cammed shape. An actuator output shaft is radially disposed within the wave generator. A flex spline is radially interposable between the radially inner surface of the wave generator and the actuator output shaft. The flex spline is deformable to conform to the radially inner surface of the wave generator and drive rotation of the actuator output shaft slower than rotation of the motor rotor.
Abstract:
An electric actuator for control of an engine includes an electric motor coupled to a drive shaft that extends to align a gear interface of the electric actuator with a variable geometry adjustment interface of the engine. A position feedback shaft extends coaxially with respect to the drive shaft. The position feedback shaft is coupled to an output shaft of the gear interface at a gear interface end of the position feedback shaft. A rotational position sensor is coupled to a motor end of the position feedback shaft proximate the electric motor. The drive shaft and the position feedback shaft are sized to position an output ring gear of the output shaft in contact with the variable geometry adjustment interface within a casing of the engine and to further position the electric motor and the rotational position sensor external to the casing of the engine.
Abstract:
A cooling system of an electromechanical actuator is provided. The cooling system includes a housing and a stator located within the housing and defining a central bore. A first body including a sleeve portion is configured to extend into the central bore of the stator, with the first body defining a first chamber including a first cavity within the sleeve portion and a second cavity fluidly connected to the first cavity. A heat sink is provided in thermal communication with the second cavity.
Abstract:
An actuator includes a housing with a linear motor slider. A portion of the linear motor slider is positioned in the housing. A transfer plate is disposed on an end of the linear motor slider. A transfer plate chamber is positioned within the housing and is divided by the transfer plate into aft and forward chambers. An aft vent is disposed in the aft chamber and includes a first membrane positioned over the aft vent. A forward vent is disposed in the aft chamber and includes a second membrane positioned over the forward vent. The first and second membranes include at least one of a hydrophobic or oleophobic material.